Individual and Junior Members

Professional scientists whose research is directly relevant to some branch of astronomy are eligible to apply as Individual Members. Individual Members are, normally, admitted by the Executive Committee on the proposal of a National Member.

Junior scientists who have completed their PhD studies between 2014 and 2019 and who are in the initial phase of the career of a professional researcher in some branch of astronomy or a related field may be admitted to the Union by the Executive Committee as Junior Members, for a period not exceeding 6 years.

Individual Members listed in the IAU Directory have a valid, public email, and are affiliated to at least one Division. They are labeled as "Active Members". For corrections and updates, please contact Any members remaining Inactive for more than 10 years will be removed from the IAU lists.

Additionally, while only Active Members are listed in the IAU Directory, you may still search for Active, Inactive or Deceased Members in the search field to your right.

Total number of IAU Individual and Junior members: 13645 (of which 533 Junior members). Number of Active Individual and Junior Members in the IAU Directory: 11113.


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Name▼ Location NCA adherence
Yorke, Harold W. United States United States
YOSHIDA, Fumi Japan Japan
YOSHIDA, Hiroshi Japan Japan
YOSHIDA, Michitoshi Japan Japan
YOSHIDA, Shin'ichirou Japan Japan
YOSHIDA , Atsumasa Japan Japan
YOSHIDA , Haruo Japan Japan
YOSHIDA , Shigeomi Japan Japan
YOSHIDA , Takashi Japan Japan
YOSHII, Yuzuru Japan Japan
YOSHIKAWA, Kohji Japan Japan
YOSHIKAWA, Makoto Japan Japan
YOSHIMURA, Hirokazu Japan Japan
Yoshino, Kouichi Japan Japan
YOSHIOKA, Kazuo Japan Japan
YOSHIOKA, Satoshi Japan Japan
Young, John Stephen United Kingdom United Kingdom
Young, Lisa Marie United States United States
Young, Mitchell E. (Junior Member) Austria Canada
Young, Peter R United States United States
youssef, manal Hanafi Ahmed Egypt Egypt
Yseboodt, Marie Belgium Belgium
YU, Cong China, Nanjing China, Nanjing
YU, Dai China, Nanjing China, Nanjing
YU, Nanhua China, Nanjing China, Nanjing
YU, Qingjuan China, Nanjing China, Nanjing
YU, Wenfei China, Nanjing China, Nanjing
YU, Yun-Wei China, Nanjing China, Nanjing
Yuan, Weimin China, Nanjing China, Nanjing
YUAN, Feng China, Nanjing China, Nanjing
YUAN, Haibo China, Nanjing China, Nanjing
YUAN, Qiang (Junior Member) China, Nanjing China, Nanjing
YUAN, QIRONG China, Nanjing China, Nanjing
YUAN, Xiangyan China, Nanjing China, Nanjing
YUAN, Ye-fei China, Nanjing China, Nanjing
YUASA, Manabu Japan Japan
Yüce, Kutluay Turkey Turkey
Yudin, Ruslan V. Russian Federation Russian Federation
YUI, Yukari Y. Japan Japan
YUJI , Ikeda Japan Japan
Yuma, Suraphong Japan Thailand
YUMIKO , Oasa Japan Japan
YUMIN, Wang Yu China, Nanjing China, Nanjing
Yun, Hong-Sik Korea, Rep of Korea, Rep of
Yun, Joao L. Portugal Portugal
Yun, Min S. United States United States
YUN, Youngjoo Korea, Rep of Korea, Rep of
Yungelson, Lev R. Russian Federation Russian Federation
Yusef-Zadeh, Farhad United States United States
Yushchenko, Alexander V. Ukraine Ukraine
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